Injection-molding apparatus

Details Injection-molding apparatus Injection-molding apparatus

1975-02-21

1976-12-28

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Dough divider type including trap chamber

Rotating trap chamber pickup

425245R, 425252, B28B 308

Patent

active

039999238

ABSTRACT:
An injection-molding apparatus for making ceramic moldings has a mold provided with a mold cavity, a structure formed with a passage which communicates with the mold cavity, and an injecting arrangement for injecting the molding material via the passage into the cavity. The injecting arrangement has a cylinder a front end of which is provided with an outlet communicating with the passage, and which also has a material inlet rearwardly spaced from the outlet. A ram is reciprocable in the cylinder between a first end position in which it is located rearwardly of the inlet and another end position in which it is located forwardly of the inlet and close to the outlet. The ram carries a rearwardly extending skirt which extends across the inlet when the ram is in its forward or second end position, so as to prevent material from entering the cylinder behind the ram through the inlet.

REFERENCES:
patent: 642581 (1900-02-01), Callaway
patent: 2862240 (1958-12-01), Strauss
patent: 3611505 (1971-10-01), Weber et al.
patent: 3723037 (1973-03-01), Formo

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